Load Specifications
Load data in caliber .30-378 Weath. Mag. with .311 | 190gr | Prvi Partizan FMJ BT bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Hodgdon Retumbo and ReloadSwiss RS 76.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 84% | 55,114 psi | 86% | 2946 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 50,502 psi | 79% | 2979 fps | 97.5% |
| Accurate High Country | <<locked>> | 82% | 57,174 psi | 90% | 3117 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 54,244 psi | 85% | 3058 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 55,941 psi | 88% | 3035 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 54,694 psi | 86% | 3051 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 54,114 psi | 85% | 3038 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 54,563 psi | 86% | 3166 fps | 99% |
| ADI AR 2225 | <<locked>> | 96% | 57,653 psi | 90% | 3120 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 56,173 psi | 88% | 3031 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 55,608 psi | 87% | 3025 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 55,303 psi | 87% | 3048 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 57,435 psi | 90% | 3005 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 54,491 psi | 85% | 3031 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 56,753 psi | 89% | 3146 fps | 99% |
| Alliant Reloder-50 | <<locked>> | 98% | 56,710 psi | 89% | 3136 fps | 98.7% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,042 psi | 86% | 3015 fps | 98.9% |
| Bofors RP15 | <<locked>> | 86% | 54,868 psi | 86% | 3041 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 54,259 psi | 85% | 3051 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 55,303 psi | 87% | 3048 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 55,506 psi | 87% | 3058 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 57,290 psi | 90% | 3045 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,115 psi | 88% | 3025 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 88% | 53,896 psi | 84% | 3127 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,058 psi | 60% | 1959 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 57,232 psi | 90% | 3018 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 86% | 57,319 psi | 90% | 3100 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 55,927 psi | 88% | 2969 fps | 96.2% |
| IMR 8133 Enduron | <<locked>> | 98% | 56,608 psi | 89% | 3107 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 57,276 psi | 90% | 2979 fps | 100% |
| Norma 217 | <<locked>> | 96% | 54,288 psi | 85% | 3068 fps | 100% |
| Norma MRP | <<locked>> | 82% | 55,550 psi | 87% | 3064 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 54,723 psi | 86% | 3061 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 57,188 psi | 90% | 3048 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,059 psi | 61% | 2001 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 54,462 psi | 85% | 3104 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 53,708 psi | 84% | 3077 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 56,217 psi | 88% | 3002 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 55,477 psi | 87% | 3015 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 52,460 psi | 82% | 2992 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,114 psi | 86% | 3015 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 57,638 psi | 90% | 2995 fps | 99.9% |
| Somchem S385 | <<locked>> | 82% | 55,724 psi | 87% | 2982 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 55,898 psi | 88% | 2976 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,216 psi | 87% | 3005 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 82% | 55,419 psi | 87% | 2979 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 54,868 psi | 86% | 3068 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 56,318 psi | 88% | 3068 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 54,230 psi | 85% | 3077 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 92% | 55,709 psi | 87% | 3150 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 84% | 54,491 psi | 85% | 3045 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,550 psi | 87% | 2982 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 48,283 psi | 76% | 2838 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 43,613 psi | 68% | 2848 fps | 95.6% |
| Accurate High Country | <<locked>> | 80% | 53,185 psi | 83% | 3048 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 80% | 50,502 psi | 79% | 2992 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 80% | 52,373 psi | 82% | 2976 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 47,587 psi | 75% | 2927 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 80% | 35,607 psi | 56% | 2664 fps | 97.1% |
| ADI AR 2218 | 104.5 gr | 88% | 40,640 psi | 64% | 2864 fps | 95% |
| ADI AR 2225 | <<locked>> | 80% | 32,996 psi | 52% | 2638 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 52,649 psi | 83% | 2972 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,156 psi | 82% | 2966 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,341 psi | 76% | 2927 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,108 psi | 74% | 2848 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,365 psi | 65% | 2802 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 42,047 psi | 66% | 2861 fps | 95.6% |
| Alliant Reloder-50 | <<locked>> | 90% | 42,206 psi | 66% | 2851 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,208 psi | 71% | 2831 fps | 96.9% |
| Bofors RP15 | <<locked>> | 80% | 45,092 psi | 71% | 2864 fps | 99.6% |
| Bofors RP30 | <<locked>> | 80% | 38,638 psi | 61% | 2746 fps | 98% |
| Bofors RP5 | <<locked>> | 80% | 48,341 psi | 76% | 2927 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 38,725 psi | 61% | 2740 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 80% | 49,966 psi | 78% | 2920 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,052 psi | 77% | 2904 fps | 99.2% |
| Hodgdon Retumbo | 89.7 gr | 80% | 40,480 psi | 63% | 2867 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,500 psi | 45% | 1749 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,473 psi | 79% | 2904 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 80% | 46,543 psi | 73% | 2913 fps | 99.3% |
| IMR 7977 Enduron | <<locked>> | 88% | 52,417 psi | 82% | 2907 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 82% | 32,750 psi | 51% | 2612 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 41,626 psi | 65% | 2713 fps | 100% |
| Norma 217 | <<locked>> | 80% | 30,922 psi | 48% | 2579 fps | 97.2% |
| Norma MRP | <<locked>> | 80% | 51,677 psi | 81% | 3002 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,195 psi | 74% | 2933 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 80% | 42,496 psi | 67% | 2795 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,327 psi | 46% | 1791 fps | 100% |
| ReloadSwiss RS 76 | 96 gr | 80% | 40,045 psi | 63% | 2841 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 36,796 psi | 58% | 2726 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 52,707 psi | 83% | 2943 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 80% | 51,924 psi | 81% | 2959 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 45,672 psi | 72% | 2864 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 51,590 psi | 81% | 2953 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 53,882 psi | 84% | 2936 fps | 99.7% |
| Somchem S385 | <<locked>> | 80% | 52,156 psi | 82% | 2927 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,890 psi | 72% | 2805 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 45,092 psi | 71% | 2815 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 51,938 psi | 81% | 2927 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,082 psi | 80% | 3002 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 80% | 42,873 psi | 67% | 2818 fps | 98.4% |
| Vihtavuori N568 | <<locked>> | 80% | 37,884 psi | 59% | 2743 fps | 95.7% |
| Vihtavuori N570 | <<locked>> | 84% | 41,742 psi | 65% | 2867 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 46,963 psi | 74% | 2927 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,356 psi | 76% | 2864 fps | 99.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 52 powders for .30-378 Weath. Mag. loaded with the .311 | 190gr | Prvi Partizan FMJ BT. ADI AR 2218 delivers the highest muzzle velocity at 3,166 fps; across all powders the maximum-charge window runs from 1,959 fps to 3,166 fps. Accurate 8700 gives the best case fill at 100 %, and 52 of the 52 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 190.0 gr projectile in 0.311" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, ReloadSwiss RS 14 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. ADI AR 2218, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .30-378 Weath. Mag. with the .311 | 190gr | Prvi Partizan FMJ BT they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.